Debugging toolbar for Rack applications implemented as middleware. Based on logical-insight and rack-bug.

Record Cache for Rails 3

Enable using native sql enums

It makes working with pure SQL easier with syntax highlighting. Let's you clean your Ruby code from SQL strings.

Easy split testing and feature flagging for Rails with TestTrack server

Enhanced AJAX handling for Rails apps.

Betterment's library for developing and testing service-oriented apps in isolation with WebMock and Sinatra-based fakes.

An Active Admin plugin to add dynamic behaviors to fields

UI interface for rails-settings-cached in active admin

Making object from any hash or hash array

Simulate multi-table inheritance for activerecord models using a polymorphic association

Represent ActiveRecord Markdown, Textile, RDoc columns as Markdown, Textile, RDoc objects using various external libraries to convert to HTML.

Fast Rails serializer with built-in caching

Cape dynamically generates Capistrano recipes for Rake tasks. It provides a DSL for reflecting on Rake tasks and mirroring them as documented Capistrano recipes. You can pass Rake task arguments via environment variables.

When ShamRack doesn't quite cut it; when your JavaScript and non-Ruby code needs to hit an external API for your tests; when you're excited about spinning up a full server instead of faking out Net::HTTP: we present the Discoball.

A gem to manage Cassandra database schema for Rails. This gem offers migrations and environment specific databases out-of-the-box for Rails users.

Patches Date, Time, and DateTime ruby classes to keep track of precision

Faster implementation of Haml template language.

https://github.com/tsukasaoishi/fresh_connection

The Instana gem is a zero configuration tool that will automatically collect key metrics and distributed traces from your Ruby processes. Just install and go.